Host Cache Coherency When Reading Data

5. The method of claim 1, wherein each entry of the cache represents a portion of data, and specifies an associated logical storage unit and an associated version of the respective portion.

7. The method of claim 6, wherein the communication is a remote direct memory access communication to a global memory of the storage system that does not require use of any central processing unit resources of the storage system.

8. The method of claim 6, wherein the first host system and the data storage system are separate physical systems, wherein the first host system includes a storage system interface that is directly connected, over at least one direct connection from a port of the storage system interface, to the internal fabric of the data storage system, wherein the data storage system includes the internal fabric that is internal within the data storage system and that is used for internal communications between components of the data storage system, wherein the components of the data storage system include a memory that is connected to the internal fabric, one or more directors, and the one or more physical devices of the data storage system.

13. The first host system of claim 9, wherein each entry of the cache represents a portion of data, and specifies an associated logical storage unit and an associated version of the respective portion.

19. The one or more non-transitory computer-readable media of claim 15, wherein each entry of the cache represents a portion of data, and specifies an associated logical storage unit and an associated version of the respective portion.

20. The system of claim 14, wherein the communication is a remote direct memory access communication to a global memory of the storage system that does not require use of any central processing unit resources of the storage system.